Arrays常用方法

Posted 2022-04-12 lizhen1412

Arrays常用方法：

package com.java.base3.Practice;

import java.util.Arrays;

public class ArraysTest 
    public static void main(String[] args) 
        int[] arr = 1, 2, 3, 4;
        int[] arr1 = 1, 3, 2, 4;

        // Arrays.equals 对比两数是否相等
        boolean isEquals = Arrays.equals(arr, arr1);
        System.out.println(isEquals);

        // Arrays.toString 输出数组信息
        System.out.println(Arrays.toString(arr1));

        // 将指定的值填充到数组之中
        Arrays.fill(arr, 99);
        System.out.println(Arrays.toString(arr));

        // 快速排序
        Arrays.sort(arr1);
        System.out.println(Arrays.toString(arr1));

        //索引位置查询
        int[] array2 = 10, 30, 50, 100, 256, 777, 787, 666;
        int index = Arrays.binarySearch(array2, 90);
        if (index >= 0) 
            System.out.println("50的索引位置是：" + index);
         else if (index < 0) 
            System.out.println("非常抱歉，索引不在此位置以内");